The electrothermal macromodel of switching voltage regulators from the L4970 family

Int J Numerical Modelling

Zarębski

2009

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SUMMARYThis paper deals with the problem of the analysis of boost and buck converters at the steady state with the use of the method of average models. The usefulness of this method is examined by comparing the boost and buck converters characteristics at the steady-state obtained both with the transient analysis with physical models of semiconductor devices and the examined method as well. The accuracy of the method of the average models is investigated with respect to the values of the circuit load resistance, the pulse-duty factor and the frequency of the signal controlling the power switch.

Section: Discussionmentioning

confidence: 96%

Investigations of the usefulness of average models for calculations characteristics of buck and boost converters at the steady state

Int J Numerical Modelling

Zarębski

2009

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“…The network structure of the model of the electrolyser is shown in Figure . This structure was worked out with the use of the method dedicated to formulate electrical models of integrated circuits described in previous studies . In this method, the measured dc current‐voltage and frequency characteristics of the considered electrolyser are indispensable.…”

Section: Electrolyser Modelmentioning

confidence: 99%

Electrical model of the alkaline electrolyser dedicated for SPICE

Zarębski

2018

Circuit Theory & Apps

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In this paper, properties of the alkaline electrolyser fed from the voltage source, producing the rectangular pulse train, were investigated. A model of this electrolyser for SPICE in the form of an electrical network was proposed. The structure of this electrical model was described, and the values of parameters of the model were presented. The correctness of this model was verified experimentally in a wide range of frequency. Using the worked out model, several characteristics of the electrolyser were calculated, and the influence of amplitude, frequency, and the duty factor of the supplying voltage on productivity and watt-hour efficiency of the electrolysis process was discussed. The investigations were performed for 2 different concentration values of the KOH solution.

“…The model worked out by the author belongs to a group of compact electrothermal models 8, 24–27. Yet, except classical dependences determining the thermal and electrical models, it includes the third component—an optical model, describing the dependence of luminance on the temperature.…”

Section: Description Of the Modelmentioning

confidence: 99%

Electrothermal model of a power LED for SPICE

Int J Numerical Modelling

2011

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SUMMARYIn this paper an electrothermal model of the power LED dedicated for SPICE is proposed. In this model electrical, thermal and optical properties of the considered device are taken into account. The description of the model and some results of the experimental verification of this model are presented for two types of power LEDS: LXHL-BW03 and LXHL-LW3C produced by Lumileds. A good agreement between the results of measurements and calculations is obtained.